<?xml version="1.0"?>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
    <title>No Spine</title>
</head>
<body>
<div>
    <h1>Missing Spine</h1>

    <p>The spine element is missing in the opf file. This element is required.</p>

</div>
</body>
</html>
